Preheat your oven to 350°F and grease your springform pan.
Wash the zucchini and apples and grate them coarsely using a grater.
In a bowl, mash the bananas with a fork until smooth. Add the margarine, sugar, and vanilla extract. Beat with a hand mixer until creamy.
In a separate bowl, combine almond flour, baking powder, salt, nutmeg, and cinnamon.
Gradually add the dry ingredients to the banana-margarine mixture and mix until smooth.
Gently fold in the grated zucchini and apples.
Pour the batter into the prepared springform pan and smooth the surface.
Bake in the preheated oven for 50-55 minutes. Use a toothpick or skewer to test if the cake is cooked through. If it comes out clean, the cake is done.
Let the cake cool completely after baking.
Combine the powdered sugar with 1-2 tablespoons of lemon juice to make a smooth glaze. Spread the glaze evenly over the cooled cake and let it set. Enjoy!